# Python 字符串大小写转换（3种）函数及用法
## title()方法
str = "c.bianchent.net"
print("str =", str)
print("str.title() =", str.title())
print()

## lower()方法
str = "I LIKE C"
print("str =", str)
print("str.lower() =", str.lower())
print()

## upper()方法
str = "i like C"
print("str =", str)
print("str.upper() =", str.upper())
